[dpdk-dev] [PATCH] lib/eal: resolve address conflicts

["Wangyu (Turing Solution Development Dep)" <seven.wangyu@huawei.com>]

Resolve address conflicts on 64K pagesize without base_virtaddr, which cause new address conflicts in eal_get_virtual_area().

Signed-off-by: Beard-627 <dengxiaofeng@huawei.com>
Acked-by: Eric wang <seven.wangyu@huawei.com>
Acked-by: Wei Hu <xavier.huwei@huawei.com>
Acked-by: Min Hu <humin29@huawei.com>
---
 lib/librte_eal/linux/eal/eal.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/lib/librte_eal/linux/eal/eal.c b/lib/librte_eal/linux/eal/eal.c index 946222c..c15d406 100644
--- a/lib/librte_eal/linux/eal/eal.c
+++ b/lib/librte_eal/linux/eal/eal.c
@@ -360,6 +360,28 @@ enum rte_iova_mode
 		return -1;
 	}
 
+	if ((getpagesize() == RTE_PGSIZE_64K) &&
+		(internal_config.base_virtaddr == 0)) {
+
+		munmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config));
+		rte_mem_cfg_addr = (void *)RTE_PTR_ALIGN_CEIL(
+			(uintptr_t)rte_mem_cfg_addr, (size_t)RTE_PGSIZE_16M);
+		rte_mem_cfg_addr = (void *)RTE_ALIGN_FLOOR(
+			(uintptr_t)rte_mem_cfg_addr -
+			sizeof(*rte_config.mem_config), sysconf(_SC_PAGE_SIZE));
+
+		rte_mem_cfg_addr = mmap(rte_mem_cfg_addr,
+			sizeof(*rte_config.mem_config),
+			PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);
+
+		if (rte_mem_cfg_addr == MAP_FAILED) {
+			close(mem_cfg_fd);
+			mem_cfg_fd = -1;
+			RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config\n");
+			return -1;
+		}
+	}
+
 	memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
 	rte_config.mem_config = rte_mem_cfg_addr;
 
--
1.8.3.1